Chapter 2 Flashcards
The study of microscopic plants and animals
Microbiology
The study of drugs
Pharmacology
Is the smallest unit of ELEMENTS
Atom
Substances from which all matter is made
Elements
What are the 96% pf the human body is made up of 4 elements
Oxygen (65%)
Carbon (18.5%)
Hydrogen (9.5%)
Nitrogen (3%)
Atom’s centre , core of atom
Composed of protons and neutrons
Nucleus
Negatively charged particles
Orbit in energy levels around the nucleus
Electrons
Is the equal number of protons in an atom’s nucleus
Atomic number
The equal to the number of protons and neutrons combined
Atomic mass
Elements that have a stable number of electrons in the outer level
Nonreactive elements
The number of bonds an atom needs to fill its outermost energy level and become stable
Valence (strength)
Form when one atom transfers electrons to another form
Weak
Mixed with water
Ionic bonds
Atoms or group of atoms with a positive or negative charge
Ions
Atoms that donates an electron
Cation
Atom that accepts an electron
Anion